Using microwaves to transmit power to receiving rectennas has already hit 70% efficiency. Exceeding that is very feasible.
Once there is full industrial infrastructure on the Moon and in Earth orbit, building microwave antennas and ground receiving rectennas is going to scale a lot better than building more and more 10,000 km lines. For a community in the middle of nowhere building a rectenna will be relatively inexpensive, but the benefit will be like getting their own fusion plant!
Once there is full industrial infrastructure on the Moon and in Earth orbit, building microwave antennas and ground receiving rectennas is going to scale a lot better than building more and more 10,000 km lines. For a community in the middle of nowhere building a rectenna will be relatively inexpensive, but the benefit will be like getting their own fusion plant!